Regulations Governing the Declaration of Acquisition of Shares in Accordance with Article 43-1, Paragraph 1 of the Securities and Exchange Act Article 9

When filing a declaration with the Competent Authority, an acquirer shall concurrently transmit a copy of the declaration to notify the acquiree company, and also a copy to notify the Taiwan Stock Exchange Corporation (TWSE) if shares of the acquiree company are listed on the TWSE, or to the Taipei Exchange (TPEx) if listed on the TPEx.With respect to the notifications by copy mentioned in the preceding paragraph, the notification is deemed to have been duly completed once transmission to the MOPS has been completed.
中文原文 證券交易法第四十三條之一第一項取得股份申報辦法第9條
取得人向主管機關申報時,除應同時以副本通知被取得股份之公司外,被取得股份之公司之股票已於證券交易所上市者,並應以副本通知臺灣證券交易所股份有限公司;於證券商營業處所買賣者,並應以副本通知財團法人中華民國證券櫃檯買賣中心。
前項副本通知事項,於完成傳輸至公開資訊觀測站後,即視為已依規定完成通知。

English translation for reference only; the Chinese text prevails. Not legal advice.